Support for java 9 jrt:/ protocol

[madduci]

Since java 9 exists a new way for loading resources, especially for module images.
The WSDL parser should be able to load those resources, if a modern jdk is used, maybe a check on the protocol used (http:/, file:/, jar:/, jrt:/) .

More references are available at this link: http://openjdk.java.net/jeps/220